Aperture blade marks - What should I do?

[TommyTang]

Advertisement (gone after registration)

Hi,

I got this used Leica Summarit-M 50 2.5 lense online, after a through check, I have noticed there are quite some marks on both side of the aperture blades.

Just would like to know:

1: What might be the reason causing these marks? Just some wear marks? Small hard particles stuck between blades? Or damaged by CLA guy?

2: Will it get wrose? Should I send to CLA again?

3: I am not sure this is a severe problem or not, at least I have not seen other lense has more marks than mine

 

Thank you for your kindly reply

Welcome, dear visitor! As registered member you'd see an image here…

Simply register for free here – We are always happy to welcome new members!

[Advertisement]

The Leica Q3 is available for pre-order at B&H Photo Video and Adorama

[jaapv]

Just a bit of harmless wear. Keep it as it is. 

[spydrxx]

Unless they cause problems shooting, just forget they exist.

[farnz]

22 hours ago, TommyTang said:

Hi,

I got this used Leica Summarit-M 50 2.5 lense online, after a through check, I have noticed there are quite some marks on both side of the aperture blades.

Perhaps you should be more concerned about the blue spot on the diaphragm blades. 

It looks like a classic case of Skybluespotitis, which can cause the diaphragm blades to move far more quickly than they should.  This is usually a result of ultra-violent light entering lens and shattering the light into individual wavelengths that cause problems when they're reassembled into the full spectrum.

Pete.

PS, I might have made all of that up.  Even the ultra-violent light.